Forging mechanism



F8818, 1930. GjT, cousm 1,747,888

FORGING MECHANISM Filed July 17, 1928 INVENTOR.

H15 ATTORNEY /ng-g v Patented Feb. 18, 1930 UNITED STATES PATENT OFFICE GEORGE T. COUSINS, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY FORGING- MECHANISM Application filed July 17,

This invention relates to forging mechanism, but more particularly to a gauging device for forgingmechanism ofthe type used for sharpening working implements,

such as drill steels and the like.

The objects of the invention are to assure the proper conformation of the cutting bit of a working implement and to enable the device to be readily, attached to and removed from the forging mechanism.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings illustrating one form which the invention may assume in practice and in which similar reference characters refer to similar parts,

Figure 1 is a sectional elevation of a pan? of co-acting gauging dies having the invention applied thereto,

Figure 2 is a transverse view taken through Figure 1 on the line 2+2 lookmg in the direction indicated by the arrows, and

Figure 3 .is a plan view, partly n section, taken through Figure 1 on the line 3-3 look ing in the direction indicated by thearrows.

Referring more particularly to the drawings, A designates a stationary die holder which may be an integral portion of a drill sharpener or like apparatus used for forging the cutting bits on working implements, such as a drill steel B. C represents a die holder disposed above the. die holder A and which may be reciprocable relatively to th8..dl8 holder A as is customary in mechanism of this type.

The die holders A and C are provided with seating surfaces D and E respectively on which are seated co-acting gauging dies F and G. The gauging dies F and G have oppositely disposed gauging grooves H for the reception of the bit end J of the working implement B. The gauging grooves H are tapered in a longitudinal direction and are curved transversely on a radius considerably larger than the radius of the cutting bit J which they areadapted to form.

The object of the gauging dies F and G is .to form reaming edges K on the cutting bit J at the point of convergence of the 50 tapered sides L leading from'a cutting edge 1928. Serial No. 293,391.

0 0f the bit with the lateral surfaces P of the wings Q, of the bit. The tapered sides L may be of any desired inclination and, as will be readily seen, were the entire outer surface of the bit J uniformly conical from the body portion R to the cutting edges 0, the points of convergence of the tapered sides L and the lateral sides P would fall within the diameter of the gauge which it is intended to maintain. It is therefore obvious that only the extreme outer corner of the cutting edges 0 would be exposed to the wearing action of the rock and in such case it would be difficult to maintain the gauge of the steel as the outer corner ofthe cuttlng edges would readily become worn.

It is essential that the reaming edges K beproperly formed on the working bit 'J.

Any slight variation of the bit J inthe gauging dies from the proper position will result in a deformed bit, that is, a portion of the reaming edge K may lie outside the gauge diameter while the remaining portion of the same reaming edge may lie within the gauge diameter and, as a consequence, the drill bit will bind in the hole being drilled. This is objectionable since it lowers the drilling efliclency and causes unnecessary strains on the drilling mechanism, In order to prevent such malformation of the reaming edges K, means are provided to assure the proper position of the cutting bit J in the recesses H. To this end the gauging die F is preferably provided in its inner end with a slot S of T-shape for the reception of a similarly shaped stop member T which fits slidably into the slot S'so that when it is in its assembled position, there will be no relative movement between the member T and the die F. Preferably, the

X which are mutually perpendicular and of such proportions and conformation as to correspond to the cutting points of the cutting bit J of the working implement.

In the construction shown, the groove IV coincides with the vertical plane of the working implement and the groove X coincides with the horizontal plane of said working implement. By means of this arrangement when the Working implement is disposed between the dies F and G in such a manner that its cutting edges will be in body engagement with the grooves WV and X, said working implement will be in the proper position for the formation of the reaming edges K.

In order to clamp the dies F and G to their respective die holders, clamp plates Y are disposed on the end surfaces of the die holders A and G to overlap the dies F and G, and bolts Z extending slidably through the plates Y are threaded into'the die holders to exert a suitable clamping effect against the dies. By thus clamping the dies in positiomthe stop member T will also be firmly clamped between the die F and the die holder A to maintain said stop member securely in position.

For the sake of simplicity of illustration, only one stop member for one size drill bit is shown. It will, however, be readily apparent to those skilled inthe art that whenever it is desired to form the reaming edges K on drill bits of either larger or smaller diameter, stop members of greater length may be provided for bits of smaller diameter or of lesslength for bits of larger diameter.

This device is particularly advantageous for use in gauging drill bits where a great number of bits of the same size are being gauged, since its proper position will at all times be assured and the stop member may be readily clamped in the operative position without necessitating securing devices other than those provided for clamping the dies in the die holders. The invention is therefore readily applicable to existing forging mechanisms.

I claim:

1. In forging mechanism, the combination of co-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the seats having oppositely disposed gauging grooves, means interposed between one die and a die holder for assuring a desired position of an article intended to be forged, and clamping means for securing the dies and the first said means securely in operative position.

2. :In forging mechanism, the combination of oo-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the I seats having oppositely disposed gauging seats having oppositely disposed gauging grooves, one of said dies having a transverse slot, and means disposed in the slot to assure a desired position of an article intended to be forged.

4:. In forging mechanism, the combination of co-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the seats having oppositely disposed gauging grooves, one of said dies having a transverse slot, and means disposed in the slot and in coaxial alignment with the grooves to assure a desired position of an article intended to be forged.

5. In forging mechanism, the combination of co-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the seats having oppositely disposed gauging grooves, one of said dies having a transverse slot in one end, and means disposed in the slot and extending into the grooves to assure the correct position of an article intended to be forged.

6. In forging mechanism, the combination of co-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the seats having oppositely disposed gauging grooves, one of said dies having a transverse slot in one end, a stop member in the slot to assure a desired position of an article intended to be forged, and clamping means .for securing the dies in the die holders and for clamping the stop member between one of the dies and a die holder.

7. In forging mechanism, the combination of co-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the seats having oppositely disposed gauging grooves, one of said dies having a T- vshaped slot, av T-shaped member in the slot, a stop portion integral 'with the T-shaped member and in coaxial alignment with the grooves to assure a desired position of an article intended to be forged, and clamping means for securing the dies in the die holders and for clamping the T-shaped member between one of the dies and a die holder.

8. In forging mechanism, the combination of ,co-acting die holders relatively movable toward and from each other and having seats in their opposing faces, gauging dies on the seats having oppositely disposed gauging grooves, one of said dies having a slot of T-shape formed transversely in one end thereof, a T-shaped member in the slot and of greater Width than the slot, a stop portion integral with the T-shaped member and in coaxial alignment with the grooves to assure a desired position of an article intended to be forged, and clamping means for securing the dies in the die holder and for clamping the T-sha-ped member between one die and its die holder.

In testimony whereof I have signed this specification.

GEO. T. COUSINS. 

